Jacob i



J. l. ROBIN.

GAS BURNER. APPLICATION FILED FEB. f4. I918.

1,304,807, Patented May 27, 1919.

, UNITED STATES PATENT ()FFIGE.

JACOBI. ROBIN, on NEW YORK, 1v. Y. I Y

ens-Brianna.

Application filed. February 14, 1918. J Serial No. 217,068;

To all whom it may concern:

Be it known that I, JAooB I. ROBIN, a citizen of the United States of America, resid ing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements Gas- Burners, of which the following is a specification. V p

The present invention has reference to gas burners ofthe Bunsen type and particularly to a method of and means for theprevention of explosions at the burner tips inside the air mixing chamber. 7

I Such explosions are usually caused by the tendency of the Bunsen flame to flash back owing to the fact that the mixture of air and gas in the supply tube has less pressure than at the reduced or restricted tips inside of the mixing chamber. Hitherto to avoid the flashing back of the flame and the consequent explosions, gauzes have been'inserted in the burner head near the tips, whose object it was to break up'or reduce the flow of the mixture before it entersthe burner tips.

But these gauzes are objectionablaowing to I their tendency of clogging, corroding, etc., and for the further reason that they require additional parts in the construction of the burners and entail additional expense.

-The object of my invention is to obviate these draw-backs and to produce a burner of.

the simplest possible construction, in which explosions or flashing back of the mixture of gas and air will be prevented without using any gauzes or any other addltlonal means.

My invention is lllustrated 1n the accompanying drawing in which similar reference characters denote corresponding parts, and in whlch Flgure 1 1s an elevation of aburner tube partly in section showing a contracted part thereof near the burner head and Fig. 2 is a cross section on line 2-2 of Fig. 1.

In the drawing A denotes a part of a Bunsen burner adapted to be connected to a gas supply pipe A and which is provided with the usual controllable air openings A for the admission of air to be admixed with the gas entering from the gas supply pipe. B denotes the tube orpipe which carries the gas and air upward. Screwed onto or otherwise secured to the top of the pipe B is the burner head piece or receptacle C in form of a truncated cone closed on its top and from the periphery of which project downwardly the burner tips D. There are four burner tips shown in the present embodiment of my Specification of Letters Patent. Patented May 2'7, 1919.

invention, but it is understood that a' smaller or larger number may be employed. Also the construction of the head C with the tips D may be similar to the one described in 'my Patent 1,135,398 of April 13,1915. The gas entering'the Bunsen tube, Afrom the supply pipe Athrough a fine openingA? is in form of a thin jet which flows in a straight line vertically and centrally through the. tube B. The air entering through the openings A of the Bunsen tube passes into the tube B and envelops the gas jet. f

It has been found that when the pipe B is of uniform diameter throughout its length, the mixture when reaching the inner open-v ings or inlets of the burner tips, will be flashed backand cause the same to ignite inside the air ,mixing chamber of the Bunsen tube. V This'is dueto the fact that the mixture which flows freely through the pipe B, on reaching the receptacle or head C, suddenly encounters the comparatively. small inner openings D of the burner tips through which-it is to pass outwardly, The quantity of mixture arriving in the chamber C is too large to pass through said openings D and the result is that it will flash back and since it is heated at the burner tips it will explode a more or less abrupt obstruction at a point.

near but not quite at the end terminating in the cone has the effect to cause the air column which is allowed to freely enter the tube, on rising and striking the said obstruction, to become deflected thereby downwardly and toward the center and produce a sort of a whirl whereby it will become thoroughly mixed with the gas jet which is directed through the center of the tube.

The mode of operation will be as follows: While the gas jet, being as stated before a thin jet, will be allowed to pass freely and with the same speed through the narrowed portion B, the air column enveloping the gas jet will when, on rising, it strikes the curved rib B become deflected downwardly and toward the central gas jet and produce a sort of whirl whereby it will become thoroughly mixed with said gas jet. By the greatly reduced inner width of the tube, the speed of the air cone will be reduced to such an extent as to admit into the head C a quantity of the mixture that will be capable of passing through the total area. of the openings D. When such quantity reaches the head C, it will become equally divided between the several openings D.

It is of course understood that the construction of my burner may be modified in various ways without departing from the spirit of my invention, and I therefore do not wish to limit myself to the details there of described and shown.

YVhat I claim and desire to secure by Letters Patent is:

1. In a gas burner, the combination with a Bunsen burner, of a tube through which flows the mixture of gas and air, and having burner tips, said tube being bent in at a point located intermediate between its ends and adjacent to the end which leads into said tips to form a considerably large and abrupt constriction at the said point where by the air will be deflected downwardly and toward the gas jet and become thoroughly mixed with the latter.

2. In a gas burner, the combination with a Bunsen burner, of a tube through which flows the mixture of gas and air, and having a head piece formed with burner tips, said tube being bent in at a point intermediate between its ends and near the end leading into the said headpiece to form a considerably large and abrupt constriction at said point whereby the air will be deflected downwardly and toward the gas jet and become thoroughly mixed with the latter.

3. In a gas burner for mantles'for incandescent light, the combination with a Bunsen burner, of a burner tube leading therefrom, a hollow truncated cone fixed to said tube, a number of burner tips projecting from the circumference of said cone, said tube having a bent in portion intermediate between its ends and adjacent the end over which said cone is mounted, said bent in portion forming a considerably large and abrupt constriction whereby the air will be deflected downwardly and toward the gas jet and become thoroughly mixed with the latter.

In testimony whereof I afiix my signature in presence of two witnesses.

J AGOB I. ROBIN.

Witnesses:

MAX D. ORDMANN, ELSIE Scrum).

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). 0. 

